package PTA.javabianchengjichu2;

import java.util.Scanner;

public class ex13 {
    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);
        while(sc.hasNext()){
            int a = sc.nextInt();
            int b= sc.nextInt();
            System.out.println(Math.addExact(a,b));
        }



    }
}
